<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
    <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
    <!-- 生产环境中不建议使用 -->
    <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
</body>


<script type="text/babel">
    let DOM = <div>
            <h2>hello , React!</h2>
            <span>hh</span>
        </div>;
    ReactDOM.render(DOM,app)
</script>

</html>